docs: def get_models(self, uniprot_acc):
          """Return all available models for a UniProt accession number.
  
          Args:
              uniprot_acc (str): UniProt ACC/ID
  
          Returns:
              dict: All available models in SWISS-MODEL for this UniProt entry
  
          """
          if uniprot_acc in self.all_models:
              return self.all_models[uniprot_acc]
          else:
              log.error('{}: no SWISS-MODELs available'.format(uniprot_acc))
              return None